Pipe-threading machine.



cm 0 9 T1 aw Y A M D E m E E m FIFE TEREADING MACHINE.

APPLIDATIOH FILED 31111220. 1905.

4 SHEETS-BEBE? L IIIVIIITOIS WHNISSIS PATENTED MAY 8, 1906. J. A HUGE & EJBERNHEIM. PIPE THRBAHI MACHENE;

'nnmulox rum) mm: 20, 1955 Ho. 820,1l4.

4 SHEETS-BEBE! 3 7 No. 820.114. PATENTED MAY 8, 1906 I. A. HOOK & B Bmmsm. PIPE THREADING ma ma.

APPLIGATIQH EELEH 28 1505.

4 SHBETE EHEET 3 War:

Machines, of which ll UN ITED S .ATES

ATENT OFFICE JOHN A. HUUK A ND ERNST BlCltNllElA/L OF PITTSBURG, PENNSYLVANIA,

ASSIGNORS TO THE NAIIONAL TUBE (10M lANY, OF PITTSBURG,

PEN NS Y LVA Nl A A. (EUR FOR A'll UN OF NE W J ERSE Y.

PlPETH'fiEADlNG MACHINE.

Specification of Letters Patent.

Patented May 8, 1908.

Application filed June; 26, 1905. Eleria l No. 256,095.

To all whmn it may rrorwern:

Be it known that we, Jme A. IIUCH and ERNST Bonn-mm, of Pittsburg, Alleglwny county, Pennsylvania, have invomod a new i and useful Improvement in Pipe lhroading following is at full, ption, releronoo being olear, and exact rloscri had to the aocolnmnyiug drnwin s, forming part of this specir-ntioo, in whit: 2'

Figaro 1 is a side elevation, paril in So? tion, and Fig. 2 is a plan View, of oullmproved maohino. Fig, 3 is a sovtional (and viewon tho lino HI Ill 01 Fig I. Figs. 4, 5, 6 and 7 ar detail views of the die-bond, s owing tho rormivnhle shoe and cutting-dim. and showing the meolmnism for moving and holding tho die-head in position to ooh the;

thread on the i o and for rolensixw thodios when the required length of thread has boon cut. Fig. 8 is a detail View showing thrmoans for adjustin the degreeto which the dies are closed by the die-holderl The object of our invention is to provi i improved means I' or cuttin r threads on pi; and reaming their ends, in wliinli the opemtion of the machine is made more nearly ant-omatic and by which the manual time required for performing the are reduced and the capacity of the machine thereby inoreas'ed.

Our invention provides improved men-hanism l3 which the dies aro autometioally rolease from their cutting osition when the required length 'of thread as been out u on the ipe more certainly and accurately t on has'heen possible heretofore.

Our invention also rovidos moans by which the dies are yieldmgly held in contact with the end of the pipe being threaded.

' The invention also provides a novel dieopener and means by which the end of the geisreamecl dnrin thethroading opera ion, t olso provides a 'n edrdie -openr for facilitatin the removal 0 the shoe containing the dieelders and dies and means for permitting the eosy removal of the reamer from the'die-head.

In the drawings, 2 re resents the frame of the pipe-threadin macliine, having a hollow spindle 3, mounts in bearings l 4, and having a counter-shaft 5, also mounted in boarin s Gfi. Theispindle 3 is hollow and allows t 2 ip {to beinserted and held in it, with the lorom-l labor and nerations E ond of the pipe. on ivliich the thread is to ho out lprojeoling through the spindlo toward 55 thoi iodioad. Tlhospindle is rotated byspurgoars 9 on the outer ends 01" the spindlo and of tho ooontonshuft, the counter-shaft being provided with n stopqiulloy ll), Whioh is connirrziod h a bolt with a motor or of power. 7 (0t shown.) 7

E? is; a grip wing-jaw heed mounted on the inner-cod of t 1e hollow spindle 3 and having grigping iznw io hold the pipe in the nmollino wlulo the threads are being out.

i2 is a, laterally-mm-nlilo none mounted on the rotary hollow spindle, which by engage- ;noot witl'i grip )ing-jmv levers 13 13 grip and hold tho pipe yyllilo heim tliromlod. The aw- 3 13' are pivotal l The laterally-monoble cone 12 is oonnectell by a yoke 14 with the pivot'ohal't lfi, which is carried in hearings. on the had of the umshine. The pivobshaft 15 is oonneotd by an arm H and links 17 with a vertioai arm 7 5 in, having an antii'riotion-rollor ii mounted on its upper ond. The lower end of the arm 1%; is connocted by :1 link 15 witlrtho and of the trsndlo 20 which is pivoted on tho shaft 21 beneath the machine.- lfiis also connected by the. arm 22 with a horizontal arm 23, which is also provided with an antifriction-roller 24. The horizontal arm 23 connoptod by a hell-crank 25 and link 26 with a tron-rile ,2? 28 is a cam mounted on the rotary spindle and adapted to more the cone 12 longitudinally on the spindle when the antifrxetionrollers 19 or 24 are moved into the pathof the face of the nesting mech anism. A die-head 29 is movably mounted on the guides 2 of the frame 2 and is yieldin 1y connected to the arm 16 on the pivot-sho t 15 by a connecting-rod 30. The

outer end of the connecting-rod 30 is carried 5 on the lower and of an arm'3l, whichis iv oted on the bracket 32,fixed to the die-hes, 29. The bracket 32 is provided with a stop 32, and the arm 31 is connected about the middle of its length st %-nnts 34 and 35 and a spring 36.

he die-head 29 is provided with a, shoe 37, and diedmlders 38 38 are fixed to the face of l the shoe, their lower ends hein pivoted on the bolts 39 and their upper and in place on the Shoo by a. guide 40. Removother source on the jow llem- 11. 76

The pivot-shaft 8o also pivoted on the shaft 21. 8 5

com by the troadles and 0011- 0 by a. rod .33, provided with a being kept able cutters 41 are adjustably mounted in the die-holders by means of the face-plates 42 and set-screws 43. The shoe 37 can be easil and (uickly removed and replaced in the ie-hearl 29, and in this wa' l r providin" two or more slices, with their ieiohlers an cutting-dies, the loss of time resulting from changing or adjusting the cutters while in the machine is avoided.

The n )per ends of the die-holders 38 are rovide with rejections 44 4-1, which fit mto divergings ots 45 45, located in the lonitudinally-reciprocating hinged die-adjusting die opener orslide 46 46, and a sin'iilar projection 47 on theshoe 37 fits into a central slot 48, also in the slide 46, and serves to keep the die-holders central on the shoe. The hin ed slide 46 is held in its seat on the top of t e die-head 29 b r means of a plate 49, and the slide is moved longitudinally on its seat to open and close the die-holders into and out of their cutting position on the die-head. The slide 46 is made in two parts, which are adjustably connected together by means ol the adjusting-screw 46", as is shown in Fig. 3, so that the degree of approach of the dies may be varied. The outer end of tl1e .slide 46 is provided with a coil-spring 50, by which the slide is moved to oped the die-holders when the thread-cutting operation is eompleted'. The con'ipression on the spring is regulated by the adjusting-nuts 51 on the end of the slide 46. hen the slide has been moved laterally to hold the dies in their closed cuttin I position, the slide 46 is held in this position by a l1arde11e l-steel pin 52, one end of which projects upwardly in to a suitable hari'lened-steel bushing 53 in the slide. The pin and bushing are made on the are of a circle whose center is the axis of the triggerlever 54, so that the motion of the pin. will not itself move theslide. The lower end of the pin 52 fits into the end of a trigger-lever 54, which is pivoted on a pin on the diehead. The lever 54 and pi 52 are held in proper position to kee the lide 46 stationary an( hold the dies'r'h closed cutting position by means of spring 56 on the end of the s ring-adjusting screw 57,n1ounted on the side of the, die-head, one end of the spring 56 engaging a' lever 55 on the outer end of the pin 55, as shown in Fig. 2.

A modification of the slide-holding mechanism is shown in Figs. 4 and 7, inwhich the slide is held in place by means of a sprin f 56, one end of which is fixed to the die-heac the other end being carried on a spring-adjusting screw 57. Attached to the lever 54 by a bolt 58 is a trigger 59, one end of which engages with the adjusting-screw 60 in the end of the longitudinally-adjustable holder 61 of the reamer. The holder 61 extends through an opening in the die-head into the shoe 37 and is prevented from rotatingby means of a feather-key 62. Fitted into the end of the reamer-holder 61 is a reamer 63,by which the end of the pipe being threaded is reamed and any burs removed and which also serves as the means by which the dies are automatically released from the pipe when the desired length of thread has been cut. The reamer 63 is provided with a shoulder 64, which comes in contact with the end of the pipe in the machine as the thread is being cut. The reamer-holder is held in plaw by the bearing of its screw 60 with the trigger 59, which in turn is pressed against it by the spring. To remove the reanier, it is only netessa to swing to one side the armof the trigger, w iieh is hinged for this purpose. The reamerholder 61 and reamer 63 are carried in and move with the sliding shoe 3?, which carrice the threadin -dies. In this way the reaincr is always lrcpt central with the dies and pipe being threaded, and the reaming of the end of the pipe in a proper manner is insured. On the end of the frame 2 of the machine is a stop-bracket 65, having an adjustable stop 66, against which the end of the slide 46 strikes when the pin 52 is released. The stop 65 also holds the slide 46 stationary when the die-head 29 is retracted after a pipe has been threaded and in this way causes the die-holders to move into their cutting position.

The operation of the machine is as follows: The machine is set in motion, the parts being in the position shown in the drawings. The operator then places the pipe through the spindle of the machine with its end in enga ement with the dies in the die-head. means of the treadle 2n the arm 18 is raised until the roller 19 on its end is in the path of the face of the cam 28 on the spindle 3. The arm 18 is moved by the revolution of the cam and thri'iugh the links 17 moves the arm 16 on the pivot'shaft i5 and causes the yoke 14 to shift the cone 1! on the spindle 3. This movement of the (one 12 spreads the ends of the jaw-levers 13 and causes the gripping- 'aws to grasp and hold the pipe in the jaw cad 11. The operator then removes his footirom the treadle and permits the arm 18 to d'ro and remove the roller 19 from the path ol the cam 28. When the vertical arm 18 is moved by the cam 28, the connectingrod 30, and through it the lever-arm 31, 1S moved also, and the 5 ring 36 is compressed on its rod 33. The .-head is not moved, as the dies are in contact with the end of the pipe in the machine, which prevents its movement. The s ring 36 kee s the dies in engagement. with t e. end of t e pipe until the pipe has entered the threading-dies. As the pipe gradually advances in the dies, the die-head is moved on the ides toward the jaw-head and away from t 1e adjustable stop 66, which is on the stop-bracket 65, fixed on the machine. The reamer 63 is provided with a shoulder 64, against which the end of the p the dies. The tresel iipes makes eonteet, and when the require length of thread has been cut on the fiige the ipe has moved the reemer and its 0 del s1: eiently to release the yin end permit the slide 46 to be retracted by the spring 50 and in this way separate the sheholders and allow the pipe ts he drawn fresh 0)? the slide 46 is regm lated by means at the adjusting-screw =15, which permits the esition of the slide se is be lengthened or s ortened and the opened and closed position of the rojeetiens is on the slots 45 to be changed. The egereter then, b}: means of the treadle 2?, reeves the horizontal arm 23 until the reller 24 is in the path of the face of the cam on the retsthrg spindle 3. The cm by eentact with the roller 24 then shifts the cane en the s indie and releases the gsippieg sws and t e eperetor then I'EIEBVQS the is ended pipe from the machine, replaces it with another pipe to be threaded, and re eats the operation.

The advent es 4) I our invention are many. The length at t e thread sileeessivel est en any number of pipes is automatiea ly re ulated; and by eperet' the trigger of the dieopener b means of lire reemer greet seege my a? ength of thread is seeured fertlre burs on the ends of the gipes being cut ewes by the reamer before t e trigger is a l den er of premature operation ef the die 0 neriy the action of such burs is prevent- Furthermore, b locating the trigger er re evice who y heck of the pfllififiii' 3g of the 'ps the dies and reemer ere i111 strss In their operstien end ne'se e adjustment 0f the tri er to suit pi es ef (hrferent diameters nee is made. e leeerel movahiiity of the trig er-arm out ef the path of the teams: is of Va ue, beeause the reams; being ordinarily held in sleee solely by trigger the lateral removal of the trig er leaves the reamer free to be withdrawn or re lacement or repair. 5; y means of the rotating cam and eezmect- 7 ing mechanism the ipe-gripping jaws are Fositively opened an elesed to grip and reeese the pipe in the machine. he time required in changing the dies in the machine is reduced. The dies are yieldingly held in eontaet with the pipe until the"thread-eutting operetien has begun, and the necessity for doing this work by the operate! is thus avoided.

Many variations in the arrangement and in the construction of the parts may be made "the resins!- and trigger are yisldrngiy held;

Without epsrihg free; our invention, Sines What we claim is 1. ln s pipe-threading machine, the eernbinetish sf e recipe" his die-esrrgrihg x r s riege, nen rststehle iizreeding-dies eer: thereby, a reciprocating dieopener e en the sesrisgs s die-opener, s Tfiffii' railed holding ue= Vice fer diesgiener, end nxeens en the in? p eventing mevement of the die opener when is retracted; enhstsntisiiy as d 3. gripe-threeding machine a reamer, s fire-epener, e sgssssi h eh the lssmer presses, and a h e as described.

7 =1 pipethresdin resch' e, spring for a gee e sh arm hetws. the

d arm heing remevehle free the reenter to permitremeve: there 33 as dessneed.

In tee? i3 we have herenes est en? l5 1905.

JOHN l-IOCK ERNST BElih iiiiiM Witnesses: Jess Masse H. Chasm; 

